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Abstract  

Thermal decomposition of three tetravanadates, [MII(phen)3]2V4O12·phen·22H2O, where M II is Co (1), Ni (2), Cu (3) and phen is 1,10-phenanthroline, was studied by dynamic method (for 1 and 2) or isothermally (for 3). The thermal decomposition of the studied compounds is a multi-step process which involve: discontinuous dehydration, release of uncoordinated, and of coordinated phenanthroline molecules. In course of the latter process, a phase transition of the cyclo-tetravanadates to polymeric metavanadates occurred. Metavanadates with chain structure of the anion were the final decomposition products of all tetravanadates studied.

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Journal of Thermal Analysis and Calorimetry
Authors: José Geraldo de P. Espínola, Evandro P. S. Martins, Franklin P. Aguiar, Haryane R. M. Silva, M. G. Fonseca, L. N. H. Arakaki, and Ercules E. S. Teotônio

remarkable advantages in terms of thermal stability and clean sublimation a difficult more synthesis, it is more expensive. In this study, a complex BiCl 3 ·L where L is 1,10-phenanthroline was obtained and characterized. Thus, considering that the

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,10-phenanthroline-5,6-dione)(4,4′-dicarboxy-2,2′-bipyridyl)ruthenium(II)], cis -[Ru(L1)(L2)(NCS) 2 ] (where the ligands were L1 = 1,10-Phenanthroline-5,6-dione and L2 = 4,4′-dicarboxy-2,2′-bipyridyl). The decomposition mechanism was also suggested for ruthenium

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Summary The penetration of the phenanthroline ligand into the interlayer space of the Cu-bentonite results in the formation of Cu(Phen)3-bentonite composite. The expansion of the d 001 basal spacing of the Cu-Bent from 14.24 to 17.7 Å on intercalation and the colour change indicate the cation immobilized dimeric ligand species’ presence, which are thermally stable up to 315°C. The shift to higher frequency of the ring vibrations resulted from the π interactions is associated with the linkage of the tilted monomers to the smectite layers at elevated temperatures. The OH stretches and the bending peaks decrease in the intensity in parallel with an easy exchange between the water groups and the aromatic backboned ligands at room temperature.

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prior to use [ 28 ]. 1,10-phenanthroline was purchased from Aldrich. Salicylaldehyde, ethyl acetoacetate, piperidine, chloroform, hexane, bromine, pyridine, toluene, cyclopentanone, cyclohexanone, α-tetralone, dimethyl formamide, and Cu(NO 3 ) 2 ·3H 2 O

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catalytic degradation of organic pollutants utilizing molecular oxygen under visible light irradiation. However, tris(1,10)-phenanthroline iron(II) has not been reported as a photo-Fenton catalyst up to now. In this study we loaded tris(1,10)-phenanthroline

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reductants [ 16 , 17 ]. Realizing the importance of organic sulfides and sulfoxides as reductants in biological systems, an investigation of the ET reaction of iron(III)–phenanthroline complex with organic sulfide, benzylthioacetic acid has been carried out

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iron(II) complexes of 4-methylpiperazine-1-carbodithioic acid (I) and sodium 4-methylpiperazine-1-carbodithioate ligands (derivatives of saturated heterocyclic secondary amine) in conjunction with the nitrogenous bases 1,10-phenanthroline and 2

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TG and DTA of the compounds Mn(phen)2X2 (where X=CN,CNO, NCS and NCSe), Mn(phen) (NCS)2, Mn(NCS)2 and Mn(NCSe)2 (wherephen=1,10 phenanthroline) are reported and discussed. Decomposition schemes are proposed based on TG and DTA results and, where possible, the analysis and properties of intermediates formed during thermal breakdown. The decomposition of thiocyanate and selenocyanate ligands is observed to lead to an apparent slight increase in sample weight. This phenomenon is discussed in relation to buoyancy changes resulting from the release of sulphur or selenium vapours.

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compounds commonly leads to nano-sized oxides and salts useful in various technical applications. As model ligands the hexamethylenetetramine (hmta) and 1,10-phenanthroline (phen) were chosen due to their specific properties: bulky shape and tetradentate

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